What is the cheapest airline that flies from Idaho Falls Fanning Field to Illinois?

Alaska Airlines and Delta are the most popular carriers operating from Idaho Falls Fanning Field to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Idaho Falls according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?

Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?

The number of operators available for flights from Idaho Falls Fanning Field Airport to Illinois is 3 as of April 2026.

How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$115 Cheap Flights from Idaho Falls to Illinois in 2026

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Find the cheapest flights from Idaho Falls to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:46 pm - 5:11 pm

IDA

ORD

3h 25mnonstop

9:40 am - 12:12 pm

ORD

IDA

3h 32mnonstop

$309American Airlines

Wed, Aug 26 - Wed, Sep 9

10:56 pm - 5:32 am

IDA

ORD

29h 36m

1 stop

7:12 am - 4:08 pm

ORD

IDA

9h 56m

1 stop

$310Multiple Airlines

Mon, Jun 15 - Mon, Jun 22

10:56 pm - 5:32 am

IDA

ORD

29h 36m

1 stop

7:12 am - 4:08 pm

ORD

IDA

9h 56m

1 stop

$318Multiple Airlines

Mon, Jun 15 - Fri, Jun 19

12:46 pm - 5:11 pm

IDA

ORD

3h 25mnonstop

6:00 am - 1:42 pm

ORD

IDA

8h 42m

1 stop

$319American Airlines

Thu, Aug 13 - Tue, Aug 18

4:10 pm - 12:44 am

IDA

ORD

7h 34m

1 stop

5:00 am - 9:50 am

ORD

IDA

5h 50m

1 stop

$329United Airlines

Fri, May 22 - Mon, May 25

4:10 pm - 12:44 am

IDA

ORD

7h 34m

1 stop

5:00 am - 9:50 am

ORD

IDA

5h 50m

1 stop

$337United Airlines

Wed, Jul 29 - Tue, Aug 4

4:03 pm - 4:37 pm

IDA

STL

23h 34m

1 stop

7:41 pm - 3:26 pm

STL

IDA

20h 45m

1 stop

$379Alaska Airlines

Tue, May 26 - Tue, Jun 2

1:54 pm - 11:54 pm

IDA

STL

9h 00m

1 stop

5:33 pm - 1:17 pm

STL

IDA

20h 44m

1 stop

$401Alaska Airlines

Thu, May 21 - Sat, May 30

5:47 am - 6:36 pm

IDA

MDW

11h 49m

2 stops

1:22 pm - 10:42 pm

MDW

IDA

10h 20m

2 stops

$437Delta

Sat, May 2 - Sat, May 9

5:47 am - 6:36 pm

IDA

MDW

11h 49m

2 stops

9:29 am - 10:40 pm

MDW

IDA

14h 11m

2 stops

$465Delta

Sat, May 2 - Wed, May 6

American Airlines flights from Idaho Falls to Illinois

Our best American Airlines deals on Idaho Falls to Illinois flight tickets

American Airlines

Aug 26

IDA12:46 pmIdaho Falls Fanning Field

3h 25m

ORD5:11 pmChicago O'Hare Intl

Sep 9

ORD9:40 amChicago O'Hare Intl

3h 32m

IDA12:12 pmIdaho Falls Fanning Field

$309

American Airlines

Aug 13

IDA12:46 pmIdaho Falls Fanning Field

3h 25m

ORD5:11 pmChicago O'Hare Intl

Aug 18

ORD6:00 amChicago O'Hare Intl

8h 42m

1 stop

IDA1:42 pmIdaho Falls Fanning Field

$319

American Airlines

Jul 29

IDA12:29 pmIdaho Falls Fanning Field

3h 30m

ORD4:59 pmChicago O'Hare Intl

Aug 4

ORD10:48 amChicago O'Hare Intl

3h 36m

IDA1:24 pmIdaho Falls Fanning Field

$321

Delta flights from Idaho Falls to Illinois

Our best Delta deals on Idaho Falls to Illinois flight tickets

Delta

May 1

IDA5:47 amIdaho Falls Fanning Field

5h 04m

1 stop

ORD11:51 amChicago O'Hare Intl

May 9

ORD1:44 pmChicago O'Hare Intl

9h 58m

2 stops

IDA10:42 pmIdaho Falls Fanning Field

$365

Delta

May 1

IDA5:47 amIdaho Falls Fanning Field

5h 04m

1 stop

ORD11:51 amChicago O'Hare Intl

May 6

ORD6:25 amChicago O'Hare Intl

17h 15m

2 stops

IDA10:40 pmIdaho Falls Fanning Field

$393

Delta

Jul 3

IDA6:00 amIdaho Falls Fanning Field

5h 00m

1 stop

ORD12:00 pmChicago O'Hare Intl

Jul 10

ORD7:45 amChicago O'Hare Intl

7h 56m

1 stop

IDA2:41 pmIdaho Falls Fanning Field

$394

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 8/26

12:46 pm-5:11 pm

Nonstop3h 25m

Chicago O'Hare Intl

Wed 9/9

9:40 am-12:12 pm

Nonstop3h 32m

$309

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 6/15

10:56 pm-5:32 am

1 stop29h 36m

Chicago O'Hare Intl

Mon 6/22

7:12 am-4:08 pm

1 stop9h 56m

$310

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 6/15

10:56 pm-5:32 am

1 stop29h 36m

Chicago O'Hare Intl

Fri 6/19

7:12 am-4:08 pm

1 stop9h 56m

$318

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 8/13

12:46 pm-5:11 pm

Nonstop3h 25m

Chicago O'Hare Intl

Tue 8/18

6:00 am-1:42 pm

1 stop8h 42m

$319

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 5/22

4:10 pm-12:44 am

1 stop7h 34m

Chicago O'Hare Intl

Mon 5/25

5:00 am-9:50 am

1 stop5h 50m

$329

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 7/29

4:10 pm-12:44 am

1 stop7h 34m

Chicago O'Hare Intl

Tue 8/4

5:00 am-9:50 am

1 stop5h 50m

$337

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Tue 5/26

4:03 pm-4:37 pm

1 stop23h 34m

Lambert-St Louis

Tue 6/2

7:41 pm-3:26 pm

1 stop20h 45m

$379

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 5/21

1:54 pm-11:54 pm

1 stop9h 00m

Lambert-St Louis

Sat 5/30

5:33 pm-1:17 pm

1 stop20h 44m

$401

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

Sat 5/2

5:47 am-6:36 pm

2 stops11h 49m

Chicago Midway

Sat 5/9

1:22 pm-10:42 pm

2 stops10h 20m

$437

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

Sat 5/2

5:47 am-6:36 pm

2 stops11h 49m

Chicago Midway

Wed 5/6

9:29 am-10:40 pm

2 stops14h 11m

$465

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho Falls to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho Falls to Illinois is on a Tuesday when prices can be found for as low as $393. Flights from Idaho Falls to Illinois on a Sunday will generally be more expensive and average around $746. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Idaho Falls to Illinois during this time can be as low as $438. Flights in the morning are often more expensive with an average ticket price of $452.

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

Fly from Idaho Falls Fanning Field to Chicago O'Hare Intl for the best Idaho Falls Fanning Field - Illinois flight prices

What cabin class options are available on Idaho Falls Fanning Field to Illinois flights?

There are 2 cabin classes available to choose from on Idaho Falls Fanning Field to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Idaho Falls to Illinois flights?

You could potentially save up to 3% on your flight if you consider stops on a Idaho Falls to Illinois flight.

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Best Price Found	$289
Fastest flight time	3h 16m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Idaho Falls in the past 72 hours is $289. The best round-trip flight deal from Idaho Falls to Illinois found on momondo in the last 72 hours is $506.

The fastest flight from Idaho Falls to Illinois takes 3h 16m

Direct flights go from Idaho Falls to Illinois every day.

There are 98 airports in Illinois. From Idaho Falls there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying from Idaho Falls to Illinois

When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?
Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?
The number of operators available for flights from Idaho Falls Fanning Field Airport to Illinois is 3 as of April 2026.
How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Idaho Falls to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Idaho Falls to Illinois is Canadair (Bombardier) Regional Jet 700, representing 42.11% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 15.79%, Boeing 737 MAX 8 at 10.53%, and Boeing 737 MAX 9 at 10.53%.

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $144	Free Cancellation	Rating 7.9 8,406 reviews	Search Delta flights
United Airlines	PriceFrom $311	Free Cancellation	Rating 7.4 9,581 reviews	Search United Airlines flights
American Airlines	PriceFrom $323	Free Cancellation	Rating 7.1 11,573 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Illinois for you.

Can I find flights from Idaho Falls to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Idaho Falls to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Idaho Falls to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho Falls.

I’m not ready to book a flight from Idaho Falls to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Idaho Falls to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.